National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, & National Research Council (U.S.). Committee on Pedestrians. (1972). Pedestrian protection: 5 reports prepared for the 51st Annual Meeting. Highway Research Board.

National Research Council (U.S.). Highway Research Board, National Research Council (U.S.). Highway Research Board. Meeting, and National Research Council (U.S.). Committee on Pedestrians. Pedestrian Protection: 5 Reports Prepared for the 51st Annual Meeting. Washington: Highway Research Board, 1972.

National Research Council (U.S.). Highway Research Board, et al. Pedestrian Protection: 5 Reports Prepared for the 51st Annual Meeting. Highway Research Board, 1972.